4
: .
1. , .
2. : - -.
3. for to (downto) do.
4. .
1. , n .
. . , 1 n 1 (. 4.1).
, .
 |
. 4.1.
program lr4_1_1;
{ . }
{ $APPTYPE CONSOLE }
Uses
SysUtils;
Const
max n =100;{ }
Var
n, i:integer;
s:real;
a: array [1..maxn] of real;
Begin
write('n= ');
readln(n);{ }
writeln('Vvedite elementi massiva a ');
for i:=1 to n do
Begin
write('a [ ', i, ' ] = ');
readln(a [ i ]);
end;
s:=0;
for i:=1 to n do
s:= s + a [ i ];
writeln(' a, ', n:4, ' ');
for i:=1 to n do
write(a [ i ]:8:2);
writeln;
writeln('S = ',s:8:2);
readln;
end.
3 ( ) , Delphi.
StringGrid. Options(goEditing) true.
. 4.1.
. 4.1 4_1
Unit-a
unit Unit1;
//
Interface
Uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, ExtCtrls, Grids, Buttons;
Type
TForm1 = class(TForm)
lbl1: TLabel;
lbledt1: TLabeledEdit;
btn1: TButton;
sd: TStringGrid;
btn2: TBitBtn;
lbl2: TLabel;
procedure lbledt1KeyPress(Sender: TObject; var Key: Char);
procedure btn1Click(Sender: TObject);
procedure sdKeyPress(Sender: TObject; var Key: Char);
Private
{ Private declarations }
Public
{ Public declarations }
end;
Var
Form1: TForm1;
|
|
|
Implementation
{$R *.dfm}
Var
n:Integer;
a:array[0..10] of Real;
s:Real;
procedure TForm1.lbledt1KeyPress(Sender: TObject; var Key: Char);
//
//Backspace Enter
Var
i:Integer;
Begin
Case Key of
'0'..'9',#8:;
#13: begin
// StringGrid
sd.ColCount:=strtoint(lbledt1.Text);
n:=sd.ColCount;
sd.Options:=sd.Options+[goEditing];
sd.Width:=n*(sd.DefaultColWidth+2);
for i:=0 to n-1 do
sd.Cells[i,0]:=' '+inttostr(i);
sd.SetFocus;
End
Else
key:=#0;
end;
end;
procedure TForm1.btn1Click(Sender: TObject);
Var
i:Integer;
Begin
f o r i:=0 to n-1 do
a[i]:= strtofloat(sd.Cells[i,1]);
s:=0;
fo r i:=0 to n-1 do
s:=s+a[i];
sd.ColCount:=sd.ColCount+1;
sd.Width:=(n+1)*(sd.DefaultColWidth+2);
sd.Cells[n,0]:=' ';
sd.Cells[n,1]:=FloatToStrF(s,ffFixed,8,3);
end;
procedure TForm1.sdKeyPress(Sender: TObject; var Key: Char);
// StringGrid
Begin
With sd do
Case Key of
'0'..'9',#8:;
'-': begin
if (Cells[Col,Row]='') then
key:='-'
Else
if (Cells[Col,Row]<>'') and ((copy(Cells[Col,Row],length(Cells[Col,Row]),1)='E') or
(copy(Cells[Col,Row],length(Cells[Col,Row]),1)='e'))then
key:='-'
Else
key:=#0;
end;
'+': begin
if (Cells[Col,Row]='') then
key:='+'
Else
if (Cells[Col,Row]<>'') and ((copy(Cells[Col,Row],length(Cells[Col,Row]),1)='E') or
(copy(Cells[Col,Row],length(Cells[Col,Row]),1)='e')) then
key:='+'
Else
key:=#0;
end;
',','.': begin
key:=decimalseparator;
if pos(decimalseparator,Cells[Col,Row])<>0 then
key:=#0
end;
'E','e': begin
key:='E';
if ((pos('E',Cells[Col,Row])<>0) or (pos('e',Cells[Col,Row])<>0))
or ((length(Cells[Col,Row])=1)
and ((copy(Cells[Col,Row],1,1)='-') or
(copy(Cells[Col,Row],1,1)='+'))) or
((length(Cells[Col,Row])=0)
And
((pos('E',Cells[Col,Row])=0) or (pos('e',Cells[Col,Row])=0))) then
key:=#0;
e n d;
#13: if col<colcount-1 then
col:=col+1;
Else
key:=#0;
end;
end;
end.
